this post was submitted on 11 Feb 2025
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Climate - truthful information about climate, related activism and politics.

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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world.  About 1C of total warming.  Second chart:  about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability.  Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases.  About 0.5C of cooling with large error bars from SO2.

Recommended actions to cut greenhouse gas emissions in the near future:

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[–] [email protected] 30 points 1 week ago (2 children)

downvoting dogshit AI slop thumbnail

[–] [email protected] 10 points 1 week ago* (last edited 1 week ago)

Well, the image itself isn't bad, but I agree they really could have spent that time to get an actual image of an Airbus hydrogen concept plane.

[–] [email protected] 5 points 1 week ago

https://cleantechnica.com/contact/

Let them know. Maybe point out the hypocrisy of telling people to go green and use less energy while they're using AI generation which is fucking awful for the environment.

[–] [email protected] 15 points 1 week ago

I'm just waiting for these companies to admit the same thing about all other forms of "sustainable aviation fuel." SAF is a joke and distracts from the fact that the travel industry needs to shift to electrified high-speed rail for continental travel and, for intercontinental travel, investigate ways to use wind and solar to make sailing an realistic option.

Admittedly, this makes long journeys longer. But the reality is that the world's obsession with fast travel is a problem in and of itself. We need to slow down as a society. There's no way around it.

[–] [email protected] 9 points 1 week ago (2 children)

Hydrogen will never catch on until we can figure out the storage problem. It's hard to store useful amounts of hydrogen in a small space without cryogenics or insane pressures. Fuel cells that generate hydrogen as needed from water or something is probably what we'll end up with.

[–] [email protected] 13 points 1 week ago (1 children)

The problem with "from water" is that it takes as much energy to separate the hydrogen and oxygen in water as you get back by oxidizing the hydrogen to produce water. You can't use water as a useful way to store hydrogen for energy because of that.

[–] [email protected] 1 points 1 week ago (1 children)

Also, that’s our drinking water you’re turning into fuel.

[–] [email protected] 1 points 1 week ago (1 children)

Good thing people have been able to use untreated ocean water as the feedstock. It looks like it needs to be scaled up, but the economic advantage should help incentivize that (seawater is free; treated water is expensive!).

[–] [email protected] 1 points 1 week ago (1 children)

Where do you store all that endless salt though? Or are you going to salinate the oceans further?

[–] [email protected] 1 points 6 days ago

Water Cycle 101: The oceans are salty because rain water has been flushing salt downstream for billions of years. Salt also collects in endorheic basins such as the Great Salt Lake and Mono Lake, for the same reason. Rain clouds form primarily from evaporation of ocean water, which leaves behind slightly increased salinity, although its effect is widely geographically distributed.

There’s a difference between that distributed evaporation and the concentrated salinity increase of effluent from a reverse osmosis desalination plant or a hypothetical hydrogen plant, but the basic answer is yes, leave the salt in the ocean. It will be fine.

[–] [email protected] 5 points 1 week ago

It's easy, really. Base grid load tends to be slow to adjust, like nuclear could take days. Use that extra base load to run electrolysis when it isn't being used. Grid usage is predictable enough that production would be pretty steady. It is already being stored successfully, and in some places there are even fueling stations for fuel cell cars like the Toyota Mirai.

The fuel is produced ostensibly "for free" and could also be reused in hydrogen turbine peaker plants nearby the nuclear facility when peak needs more peak. For double-free.

We have a new fuel source for a car type that already exists, that has faster refueling times and better range than electric alone, and the fuel cycle is zero carbon.

Fueling stations need to swap tanks, but they can all still exist, so we don't break a section of the economy at the same time. (The cost to each fueling station would likely be a challenge, in the old days, a government subsidy for conversion would take care of that.)

Suddenly, we're all on green energy and fossil fuels can suck it. Meanwhile, millions of cars are spewing water exhaust all over instead of pollution, helping with weather/drought cycles at scale.

--sent from an Al Gore Dream

wakes up

Oh shit, we're in now Nazi America, never mind.

[–] [email protected] 7 points 1 week ago (2 children)

Why is a "clean technica" website using AI imagery? Hard to take seriously

[–] [email protected] 6 points 1 week ago

I really despise how many websites have just started to openly use AI pictures for their featured images. I agree that it's hard to take seriously. To me: It also says a lot about the values of the websites that use it.

[–] [email protected] 6 points 1 week ago

shocked Pikachu face

[–] [email protected] 2 points 1 week ago
[–] [email protected] 1 points 1 week ago

I don't how this guy seems to have made a living shitting on hydrogen without ever showing his working out. I guess he saves costs by using AI generation